Heating-boiler.



H. M. WELLS.

, HEATING BOILER.

APPLIOATION FILED FEB.28,1908.

Patented Dec. 1, 1908.

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HEATING BOILER. APPLICATION FILED FEB. 28, 19081 905313. I Patented Dec.'1,1908.

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ATTORNEY.

HARRY MELVIN WELLS, OI ALEXANDRIA. INDIANA.

HE ATING-B OILEB.

Specification of Letters Patent.

Patented Dec. 1, 1908.

Application filed February 2a; 1903. Serial No. 418,240,

To all whom it may concern:

Be it known that I, HARRY MELVIN TELLS, a citizen of the United States, rc-

siding at Alexandria, in the county of Madison and State of Indiana, have invented certam new and useful Improvements in Heating-i3oilers; and I do declare the following to g The boiler has an inner part that comprisesbe a full, clear, and exact description of the invention, reference being bad to the accompanying drawings, and to the letters and figures of reference marked thereon, which form a part of this specification. This invention relates to boilers for heating water or for generating low pressure steam to be used forheatingbuildlngs by means of radiators or circulating pipes, the invention having reference particularly to a combined boiler and; furnace.

Objects of the invention are to provide an improved and highly efficient heating boiler for the above-ment1oned or other purposes and a furnace conveniently combined therewith, and adapted to be conveniently set up for use; to provide a heating boiler and furnace that will be capable of heating water or producing steam with the minimum amount of fuel, so as to be economical in operation; a further object being torovide an improved heatinp boiler that will be adapted to be easily .rept in working condition.

The invention consists in a heating boiler having certain novel features of construction and in certain novel parts and co nbinations and arrangements of parts thereof, as hereinafter particularly described and defined in the appended claim.

Referring to the drawings Figure 1 is a side elevation of the improved boiler without any covering; Fig. 2, a front elevation thereof; Fig. 3, a transverse sectional view approxiinately on the line A A in Fig. 1; Fig. 4, a

longitudinal vertical sectional view apnroxi-.

mately on the line B B in Fig. 2 and, Fig. 5, a horizontal sectional view approxim ately on the line C0 in Fig. 4. r

I J, Similar reference characters in the different figures of the drawings designate corresponding elements or features of construction.

The boiler comprises an outer part or shell -1 that is circular and has a suitable number of brackets 2 attached to the outer side there ,of that may serve to support the boiler one I support the boiler when. desired, and the exterior of the "shelhnay be covered by any suitable material to prevent loss of heat, as will be understood. An annular head 4 is suitably attached to one end of the outer part and is preferably flanged so as to be convenient for connection with the outer part.

curved lower and upper portions 5 and 6 respectively and straight side portions 7 and 8 respectively, there being a water space between the outer and nner parts of the boiler, one end of the inner part being suitably attached to the head 4, and the other end having headgsuitably attached thereto. The other end-of the outer part has a head 10 suitably attached thereto, and a plurality of draft flue-s 11 are connectedto the head 9 and also to the head 10, the heads being suitably perforated to receive the flues.

A. plurality of water tubes 12 are connected to the side portions 7 and 8 of the inner part of the boiler and therefore are arranged hori I zontally and connect the water spaces at the two opposite sides of the. inner part. No tubes are connected to the lower front portions of the sides 7 and 8, the space there between the two sides 7 and 8 being designed to be used as a fire box, the side walls of which are the side portions 7 and 8, there being tubes above the fire box space and also bctwcenithe fire box space and the head 9, so thatheat from the fuel may pass between the different water tubes.

A boiler front 13 is suitablysecured to the head 4 and has a fire door frame 14, the froiit being protected by a fire brick lining 15, forming the front wall of the furnace, and a fire door 16 is mounted on the front 13, the

latter having also an ash pit door frame 17 provided with a door 18. A rail 19 is supported on the inner side of the front 13, and the forward ends of grates 20 rest on the rail, the rearward endsof the grates resting on the forward lower water tube 12', the space bctween the grates and the lower portion 5 of the inner part serving as an ash pit. Suitable stay-bolts 21 and 22 are attached to the outer part and the inner part of the boiler,

A smoke box 23 is attached to the head 10 and has a door 24 there being a chimney connection 25 on the top of the smoke box A suitable number of outlet plpes 26 are con nected to the top of the outer part 1 for carrying off hot water or steam to the circulating pipes or radiators, and a suitable number of. pipes 27 are connected to the under side of i stance,

the outer part or shell 1 to receive the return water from the circulating pipes. Also a feed pipe 28 having a valve 29 is connected to the outer part 1 for supplying the boiler with Water.

In some cases when it is desired to construct the boiler so that access may be had to the water tubes 12 for cleaning them or for making repairs, the outer part or shell 1 have two openings 30 and 31 made therein so as to be opposite to the side portions 7 and 8 of the inner part, the openings being of suitable diameters to permit of the insertion or removal of the tubes 12 or 12 should occasion require it. The openings are provided with strong frames 32 and 33 respectively that are suitably attached to the shell and have removable caps 34 and 35 respectively, and

ackings 36 and 37 t preVent leakage at the )(ilIltS between the caps and the frames. The frames are provided with a suitable number of lifting handles 38. Preferably the straight side portions 7 and 8 of the inner part have a suitable number of stay-bolts 39 secured thereto and extending through the caps 34 and 35 with screw nuts 40 on the ends of the stay-bolts and bearing against the exterior of the caps so as to strengthen the flat side portions of the inner part, and it will be understood that the nuts 40 may be removed before removing the caps from their frames. Any-editable provision may be made for removing mud or scale from the boiler, as will be understood. If the door 24 be opened, it is apparent that access may be had to the fines 11, either for cleaning them or for making repairs or renewals. Any soot that may be pushed from the fines 11 onto the lower portion 5 of the inner part may be readily scraped out through the ash an door along with the ashes that may rop from the grates. It will be noticed that a clear space is provided between the head 9 and the nearest group of water tubes 12, so as to form a combustion chamber for the gases and smoke that may pass from the fire box. Also above the uppermost water tubes 12 there is a clear space under the curved ortion 6 of the inner art, forming a desirab e combustion cham- It should be understood that it is aimed to eeaeis as the use of fire bricks or arches in the fire-box, or a wall or a damper under the tube 12, or draft regulators elsewhere if de-' sired; and in practical use, on the relatively small rate area any suitable fuel may be burne the resulting heat and gases that may be artially-unconsumed passing upward and rearward through the spaces between the water tubes 12 into the combustion chambers where more perfect combustion may-take place and thence through the fines 11 to give up the heat to the water surrounding the fines, the draft currents passing out through the smoke box.

The effect of the heat on the side portions 7 and 8 and the tubes 12 will not be uniform owing to differences in the intensity ofthe furnace heat at different points, so that circulation will be set up through the tubes 12 in describe the invention so as to be clearly un- 1 derstood, without describing in detail various modifications that may obviously be made, or well-known appliances to adapt the invention for various purposes such, for indifferent directions, the water passing from left to right through some of the tubes and in the opposite direction through others, so that the water not only in the tubes but throughout the boiler may be heated 'sufiiciently for the purpose with relatively low consumption of fuel. i

Having thus described the invention, what is claimed as new is A boiler including a circular outer'part having two 0 enings in opposite sides thereof and provide with frames at the openings, caps attached removably to the frames, an annular head attached to one end of the outer part, a perforate head attached to the opposite end of the outer part, an inner part within the outer part connected therewith and having one end thereof attached to the annular head, the inner part having straight sides opposite the caps, a. perforate head attached to the opposite end of the inner art, fines connecter to the perforate hea s, a boiler front attached to the annular head and having doors thereon, a smoke box connected to the outer part at the perforate head, fire grates in the inner part adjacent to the front, and water tubes extending across the interior of the inner part in the space above the grates and between the grates and the lines and having their ends connected to the straight sides of the inner part'opposite to the caps.

In testimony whereof, Iaflix my signature in presence of two witnesses.

HARRY MELVIN WELLS.

Witnesses:

Tnos. H. Jones, ANDREW T. SULLIVAN. 

